Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Supplemental Disclosure of Cash Flow Information:
Interest paid	$ 33,397	$ 37,518
Income taxes paid	64	656
Cash paid for operating leases	2,911	0
Supplemental Disclosure of Noncash Investing and Financing Activities:
Accrued capital expenditures	5,163	760
Dividend distributions declared, but not paid	64,922	63,828
Redemption of noncontrolling interest	527	2,413
ROU assets obtained in exchange for lease obligations	$ 197,099	$ 0